Heating riser



Sept. 1, 1936. H. F. MARSHALL HEAT ING RISER Filed May 17, 1955 INVENTDR HAoLo F.' MARSHALL Patented Sept. 1, 1936 PATENT OFFICE HEATING BISER Harold F. Marshall, Palmyra, N. J., assignor to..

Warren Webster & Company, Camden, N. J., a corporation of New Jersey Application May 17,

l1 Claims.

This invention relates to heating systems and has particular reference to systems employing heating risers.

It has been the practice for many years in many Vinstallations to depend upon the heat deliveredV from exposed supply pipes to supplement the heat delivered by radiators to supply Vsuiiicient heat for the requirements. These supply pipes are known as heating risers.

Heating risers are also frequently run vertically through small rooms such as bath rooms, kitchens, elevators shafts and the like as the sole means of `heatingthese spaces, thus avoiding the added expense of installing small radiators and their necessary connections.

Present day systems effectively control thel steam delivery to radiators by means of the combination of orices installed at the entrance to the radiators and central pressure control means which will vary the pressure dilerence across these orices.

In installationswhere heating risers are employed, they are frequently found to represent a substantial portion of the total heating load, ranging sometimes as high as 35 per cent of the total load. Consequently, installations of this Ynature having large heating riser loads constituted a special problem because the possibility of effecting steam savings through the use of controlled systems was materially curtailed, the heating riser portion of the load being uncontrollable.

One object of theV present invention is to provide aheat unit to replace so-called heating risers retaining the simplicity and other advantages of the heat riser by occupying very limited space and embodying all the advantages of control referred to in the, preceding paragraph.

A further obje'ct of the present invention is to provide a, controllable heating riser.

Another object is to provide a heating riser in which steam delivery can be modied by change of pressure differential where pressure differential controls are employed, or in frequency or thus making it possible to locate both supply andY return connections at the base of the riser.

According to the invention the heating riser comprises the outer radiating tube, an inner tube connecting the steam supply, and means located at desired points in said inner tube to inject steam from said inner tube to4 said outer tube. The

means employed. may be in the form of couplings 1935, Serial No. 21,935

having orifices for discharging steam into the outer tube, and said couplings may be equipped with means for maintaining the inner tube at the center of the outer tube, and so designed that the condensation may descend to the bottom of the outer tube. The upper ends of the tubes may be plugged, thereby eliminating the necessity of return connections.

The drawing illustrates an embodiment of the invention and the views therein are as follows:

, Fig. 1 is a side elevation of the heating riser system with sections broken out.

Fig. 2 is an enlarged vertical sectional view of the bottom of the riser and shows the fitting employed for admitting steam to the inner ,tube and for disposing of condensation from the outer tube.

Fig. 3 is a vertical sectional view of the coupling employed.

Fig. 4 is a top plan View of the same.

Fig. 5 is a small detail looking in the dir, ction 20 of the arrow A. ji

Fig. 6 is an enlarged vertical sectional view of the fitting employed at the bottom of the riser.

Fig. 7 is a top plan view of the same.

Fig. 8 is a cross sectional View of the riser show- 25 screwed into the threaded collar I1, andthe lower 35 end of the inner tube `I3 being screwed into the central threaded neck I8.

This 'central neckis the terminus of an elbow I I9 whose lower end extends to the threaded boss 2l on the side of the tting.

Pipe fittings 22 extend from the steam supply main 23 and into the threaded boss 2 I.

Surrounding the elbow I9 in the fitting I6 is a well or sump 24 which has an outlet through the boss 26. This outlet is fitted with a thermostatic trap 25 included in the usual `drain equipment 21 leading to a return or waste pipe 28. The fitting I6 has strengthening ribs 29 extending between the elbow and the side walls thereof While the lower end of said fitting has a boss 3| threaded to receive a plug3 I which may be removed for cleansing the well or sump.

At a suitable distance above each oor of the building the inner steam tube I3 is provided with a coupling 32 which is shown in detail in Figs. 3

The outer tube has the ends of its sectionsv se- 4 cured in couplings 4U, each of which is provided with a threaded hole for receiving a pipe plug 4I from the tube. Steam under-pressure' is admitted from the supply main 23 from which itwpasses through the pipes 22 and elbow] 9 in the fitting I Ipl and into the inner tube I3. The air in said tube 20 is forced through the orifices 31 of the-couplings .-32nso that said tubeisr completely-.filled `with steam.

` The-,steam passesthroughthe orices 31V and is directed downward by the pressure of saine and it 25 thus `surrounds the inner. tube both IVbelow and abovethe coupling32, heating a section ofthe f outer radiating tube I2. y

1"I'he'length of the heated section f the outer vradiating tube will ybe directly controlled by the 30 pressureofthe steam, thereby providing a tubular radiator'controllablefrom thesame equipment employed for controlling the main radiators of .the building.

f The air in the outer Ytubewill of course be forced ,.,i35 ..into .thesections `of the outer tube between the heated. areas, and thecondensation which is free to pass the several couplings 32 will descend into the well or sump 24 from which itlisremoyed throughthe hermostatic trap 25and the pipes 21 40 inteiherstumripe 28- W Some of the air in the outer tube will also descend and be carried oifthrough the returnpipe,

and the condensation :will carry some of itdownward. .-45 Thelevelof condensation inthe well 24 is Afixed Aby the o utletin the boss-26and is just belowthe lowest wall of the elbow I9. It will be self-evident that-.the special coupling Y shownin Figs. 3, 4V and 5 may be omitted and holes 50 ..drilled.. in thewall ofthe inner tube I3. @These holes may be-oblique so as to direct the steam .downward or in any desired direction.`

Of courselthe heating riser, couplings .and fit- T,.tings may benmodified andfchanged in various 155 wayswithout departing from the'v invention hereinset forth and hereafter claimed.k

The invention is herebyelaimed as follows: l:- .1.A riser for a heating system, saidriser com- ..prisingan outer radiating tube, an inner tube con- 60 necting a source o f steam supply, couplings with orices in` said inner tube for delivering steam from said tube tov said riser vto heat sections adjacent said couplings, andjsprings surrounding the inner tube and engaging the outer tube to prevent 6 5r` chattering Vvbetween the couplings and said outer .tube. Y f

s 2L A heating riser comprising an inner and an ....outer tube, couplings'with orifices in said inner tubegforadmitting steam from the inner to the ..70. outer tube, a fitting. providing means for attach- .jmentto a supply.mainfor admitting steam to the inner tube, and a well for collectingthe condensation .from .the .outer tube. l

.3.v A heatingriser comprising an inner and an tube for admitting steam from the inner to the outer tube, a fitting providing means for attachment to a supply main for admitting steam to the inner tube, a well for collecting the condensation from the outer tube, and means for attachment to a return pipe whereby the condensation is removed from said well.

4. A heating riser comprising an inner and an,

outer tube, couplings with orifices in said inner tube for admitting steam from the inner to the 10 outer tube, means for preventing chattering between the couplings and said outer tube, a fitting providing means for attachment to a supply main for admitting steam to the inner tube, and a well which may be removedzforexcluding excess air for :..coll'eeting the condensation from the outer 15 tube.

Y 5. A heating riser comprising an inner and an outer tube,couplings with orifices in said Vinner tube foradmitting steam from the inner to the outer tube, means for preventing chattering between the couplings and said outer tube, a tting providing Ameans for attachment. to a supply main for admitting steam to the inner tube,- awell for collecting ythe condensation fromthe outer tube,'and means for attachment to a returnpipe 25 wherebythe condensationis removed from said well. v

, 6. A.coup ling for heat risers havingan inner steam tube and an outerradiating tube, said coupling having means for-attachmenttothe ends fof: successive sections ofthe inner tube, means on the coupling for centering the inner tube in the outertube when the coupling is installed in the inner tube, and an orifice in said coupling for delivering steam downwardly into the outer tube.

'1. A multiple level riser for a controlled heating system,.said riser comprising an unobstructed V'outer radiator .tube extending continuously .through said levels, an inner tube connected to a source ofsteam s upply and being substantially 40 coextens'ive with said outer tube, 4and one or more orifices in said inner tube for each level, whereby pressure regulation willdeliver varying quanti- .ties of-steamfrom v the inner tothe outerV tube to heat predeterminedsections of said outer tube.

8. A multiple level riser for a controlled heating system, said riser comprising an unobstructed outer radiator tube extending continuously .through said levels, an inner tube connected to a source of steam supply and being substantially V coextensive with said outer tube, one ormore orifices in Ysaid inner tube Ifor eachlevel, whereby pressure. regulation will deliver varying quanti- V.source o fsteamsupply vand being substantially co-extensive with said outer tube, one or more orii ces insaid inner tube `for each level, whereby pressure regulation will deliver varyingV quantities of steam from the inner to the outer tube toheat predetermined sections of said outer tube, and

springs surrounding said inner tube and engaging said outer tube for centering the inner tube in the outer tube. 10. A multiple level riser for a controlled steam heating system in which steam is deliveredcon- ,tinuously, said riser comprisingan outer radiator Atube extending continuously through said levels, an inner tube connected rto a source ofsteam sup.` 75

ply and being substantially co-extensive with said outer tube, the space between said tubes being substantially unobstructed so that the condensate from the different levels may pass downward through said space, orices in the inner tube at predetermined locations for heating the desired levels, and means for draining the condensate from the riser.

11. A multiple level riser for a controlled steam heating system in which steam is delivered continuously, said riser comprising an outer radiator tube extending continuously through said levels,

HAROLD F. MARSHALL. 

